Jw Heo

9 Questions 1 Answers 0 Followers

Questions related from Jw Heo

Which experimental apparatus(flask) should I use for chemical reaction of woven carbon fibers (textile type)?

I want to make the chemical reaction for the textile type of carbon fiber. (For example, the reaction of carbon fiber (10cm x 10cm x 0.3mm) at elevated temperature under nitrogen atmosphere) I...

02 March 2020 7,730 1 View

How long do you grind functionalized graphene oxide using mortar and pestle to make it powder form?

I did an experiment of making functionalized graphene oxide and dried it in a vacuum oven after centrifugation, and ground f-GO using mortar and pestle. But, after grinding, it still didn't...

29 November 2019 7,663 3 View

How can I distinguish Ester bond from -COOH in FT-IR?

I synthesized a silica-functionalized graphene through esterification. I found an ester peak(~1735 cm-1) in the functionalized GO, however, I also found the same peak in the original GO. Then,...

09 September 2019 5,048 3 View

How do you determine the proper amount of material when you try to functionalize Graphene Oxide a lot at once?

I want to functionalize graphene oxide using esterification. When I searched the papers about this kind of reaction, I found that many authors synthesized ~100 mg of graphene oxide. However, I...

16 August 2019 7,717 3 View

Can I use P2O5 (dehydrating agent) instead of DCC/DMAP for the steglich esterification?

I have used DCC/DMAP catalyst for esterification of graphene oxide. (COOH group of graphene oxide + OH group of silica) However, I had a problem of removing DCU product from DCC. And, I saw the...

16 August 2019 9,981 0 View

Does the quality of Graphene Oxide get worse if GO is in DI water for a long time?

I took Graphene Oxide in DI water for 3 days for neutralization.. I used the method of vacuum filtration, and, beyond my expectation, it took a long time for making PH of GO as 7 or 8. Is it okay...

22 June 2019 400 4 View

How can apply the grafting method on carbon fiber to other carbon material?

I found a paper about grafting silica nanomaterial to carbon fiber. Shortly, 1) CF-COOH is made. 2) With a reflux reaction (at 50C, 4h), CF-COOH reacts with solvent including silica nanomaterial....

18 June 2019 2,125 3 View

How to make a masterbatch in the case of thermoplastic pellet and cnt for extrusion?

I want to make a masterbatch for extrusion (I will use a twin-screw extruder) I searched the method to make masterbatch, and one example is mixing powder and cnt (melt-blending, or centrifugal...

21 April 2019 3,592 3 View

I want to synthesize the compatibilizer of PPS, especially PPS-COOH?

I want to synthesize the compatibilizer of PPS for extrusion, especially PPS-COOH or other PPS derivatives . I found a research paper where PPS-COOH is made by using 'high pressure reactor' Is...

21 February 2019 3,868 2 View